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Unveiling the mechanism of electron transfer facilitated regeneration of active Fe2+ by nano-dispersed iron/graphene catalyst for phenol removal
Wang, PL (Wang, Penglei); Zhou, X (Zhou, Xin); Zhang, YG (Zhang, Yagang); Yang, LP (Yang, Liping); Zhi, KK (Zhi, Keke); Wang, LL (Wang, Lulu); Zhang, LT (Zhang, Letao); Guo, XF (Guo, Xinfeng)
2017
Source PublicationRSC ADVANCES
ISSN2046-2069
Volume7Issue:43Pages:26983-26991
Abstract

Nano-dispersed Fe-0 and Fe3O4 on reduced graphene oxide (Fe-0/Fe3O4-RGO) was prepared and characterized. The prepared Fe-0/Fe3O4-RGO was used as a magnetically separable Fenton-like catalyst and showed superior catalytic activity compared to Fe3O4-RGO and Fe3O4 as well as other Fenton-like catalysts for the removal of phenol. The Fe-0/Fe3O4-RGO achieved 100% removal efficiency for phenol within 30 min. Free radical inhibition experiments and Electron Paramagnetic Resonance (EPR) showed that the main reactive species was (OH)-O-center dot rather than Fe-IV.High resolution TEM results revealed that nanoscale Fe-0 and Fe3O4 were uniformly dispersed and distributed on RGO without agglomeration, furnishing more active sites. The catalyst featured a unique mechanism of electron transfer-facilitated regeneration of active Fe2+ by nano-dispersed iron/graphene. RGO served as an effective mediator to facilitate the electron transfer from Fe-0 to equivalent to Fe3+ for the regeneration of equivalent to Fe2+, which was critical in the catalytic process. This electron transfer-facilitated regeneration of active Fe2+ resulted in a reusable catalyst with high catalytic activity for the removal of phenol. The nano-dispersed Fe-0/Fe3O4-RGO could be easily separated and recovered by magnetic field. The Fe-0/Fe3O4-RGO catalyst was reusable and the removal efficiency of phenol after 5 catalytic cycles was as high as 93%. The Fe-0/Fe3O4-RGO could be an effective Fenton-like catalyst for the treatment of waste water containing refractory phenol and phenol type pollutants.

DOI10.1039/c7ra04312k
Indexed BySCI
WOS IDWOS:000401975700058
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/5073
Collection资源化学研究室
Corresponding AuthorZhang, YG (Zhang, Yagang)
Affiliation1.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Xinjiang Inst Engn, Dept Chem & Environm Engn, Urumqi 830023, Peoples R China
Recommended Citation
GB/T 7714
Wang, PL ,Zhou, X ,Zhang, YG ,et al. Unveiling the mechanism of electron transfer facilitated regeneration of active Fe2+ by nano-dispersed iron/graphene catalyst for phenol removal[J]. RSC ADVANCES,2017,7(43):26983-26991.
APA Wang, PL .,Zhou, X .,Zhang, YG .,Yang, LP .,Zhi, KK .,...&Guo, XF .(2017).Unveiling the mechanism of electron transfer facilitated regeneration of active Fe2+ by nano-dispersed iron/graphene catalyst for phenol removal.RSC ADVANCES,7(43),26983-26991.
MLA Wang, PL ,et al."Unveiling the mechanism of electron transfer facilitated regeneration of active Fe2+ by nano-dispersed iron/graphene catalyst for phenol removal".RSC ADVANCES 7.43(2017):26983-26991.
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